# ServerSSLSetupHandler.java

    /*
     *  Licensed to the Apache Software Foundation (ASF) under one
     *  or more contributor license agreements.  See the NOTICE file
     *  distributed with this work for additional information
     *  regarding copyright ownership.  The ASF licenses this file
     *  to you under the Apache License, Version 2.0 (the
     *  "License"); you may not use this file except in compliance
     *  with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     *  Unless required by applicable law or agreed to in writing,
     *  software distributed under the License is distributed on an
     *   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     *  KIND, either express or implied.  See the License for the
     *  specific language governing permissions and limitations
     *  under the License.
     */
    package org.apache.synapse.transport.http.conn;

    import org.apache.http.nio.reactor.IOSession;
    import org.apache.http.nio.reactor.ssl.SSLSetupHandler;
    import org.apache.synapse.transport.certificatevalidation.CertificateVerificationException;
    import org.apache.synapse.transport.certificatevalidation.CertificateVerificationManager;

    import javax.net.ssl.SSLEngine;
    import javax.net.ssl.SSLException;
    import javax.net.ssl.SSLSession;
    import java.net.InetAddress;
    import java.net.InetSocketAddress;
    import java.net.SocketAddress;

    public class ServerSSLSetupHandler implements SSLSetupHandler {

        private final SSLClientAuth clientAuth;
        /** Enabled SSL handshake protocols (e.g. SSLv3, TLSv1) */
        private final String[] httpsProtocols;
        private CertificateVerificationManager verificationManager;
        /** Ciphers enabled in axis2.xml, enabled all if null*/
        private final String[] preferredCiphers;

        public ServerSSLSetupHandler(final SSLClientAuth clientAuth, final String[] httpsProtocols,
                final CertificateVerificationManager verificationManager, final String[] preferredCiphers) {
            this.clientAuth = clientAuth;
            this.httpsProtocols = httpsProtocols;
            this.verificationManager = verificationManager;
            this.preferredCiphers = preferredCiphers;
        }

        public void initalize(
            final SSLEngine sslengine) throws SSLException {
            if (clientAuth != null) {
                switch (clientAuth) {
                case OPTIONAL:
                    sslengine.setWantClientAuth(true);
                    break;
                case REQUIRED:
                    sslengine.setNeedClientAuth(true);
                }
            }
            // set handshake protocols if they are specified in transport
            // configuration.
            if (httpsProtocols != null) {
                sslengine.setEnabledProtocols(httpsProtocols);
            }

            //set enabled ciphers if specified, enable all if otherwise
            if (preferredCiphers != null) {
                sslengine.setEnabledCipherSuites(preferredCiphers);
            }

        }

        public void verify(
                final IOSession iosession,
                final SSLSession sslsession) throws SSLException {

            if (verificationManager != null) {
                try {
                    verificationManager.verifyCertificateValidity(sslsession.getPeerCertificates());
                } catch (CertificateVerificationException e) {
                    SocketAddress remoteAddress = iosession.getRemoteAddress();
                    String address;
                    if (remoteAddress instanceof InetSocketAddress) {
                        InetSocketAddress inetSocketAddress = (InetSocketAddress) remoteAddress;
                        InetAddress internetAddress = inetSocketAddress.getAddress();
                        if (internetAddress != null) {
                            address = internetAddress.getHostAddress();
                        } else {
                            address = inetSocketAddress.getHostName();
                        }
                    } else {
                        address = remoteAddress.toString();
                    }
                    throw new SSLException("Certificate Chain Validation failed for host : " + address, e);
                }
            }

        }

    }